GM Astro/Safari 1985-1996 Repair Guide



The flywheel and the ring gear are machined from one piece of metal and cannot be separated.

The flywheel on automatic transmission vehicles is usually referred to as a flexplate. Though the job they do is quite different, the two terms are often interchanged.


See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Exploded view of a typical Astro and Safari flywheel mounting-flexplate mounting similar, but without a clutch and pressure plate assembly

  1. Remove the transmission assembly from the vehicle.
  3. If equipped with a manual transmission, remove the clutch and pressure plate assembly.
  5. Remove the flywheel-to-crankshaft bolts, then remove the flywheel from the engine.

To install:
  1. Inspect the flywheel for cracks, and inspect the ring gear for burrs or worn teeth. Replace the flywheel if any damage is apparent. Remove burrs with a mill file. On manual transmission vehicles, check the wheel for scoring, wear or other damage. If the scoring or wear is minimal, it may be possible to have the flywheel machined (turned) in order to keep it in service.
  3. Install the flywheel. Most flywheels will attach to the crankshaft in only one position, as the bolt holes are unevenly spaced and/or the crankshaft is fitted with a dowel pin. Install the bolts and tighten to specification using a criss-cross pattern.
  5. If equipped, install the clutch and pressure plate assembly.
  7. Install the transmission assembly.